package weixin import ( "math/rand" "time" ) func randomStr(length int) string { str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" bytes := []byte(str) result := []byte{} r := rand.New(rand.NewSource(time.Now().UnixNano())) for i := 0; i < length; i++ { result = append(result, bytes[r.Intn(len(bytes))]) } return string(result) }